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 Falkland Flightless Steamer Duck, Tachyeres brachypterus
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Tachyeres patachonicus |
Tachyeres (Steamer Ducks)[1] is a genus of ducks in the bird family Anatidae. The Falkland Steamerduck, Tachyeres brachypterus, is a Duck native to the Falkland Islands in the southern Atlantic Ocean. Chordates ( Phylum Chordata) are a group of Animals that includes the Vertebrates together with several closely related Invertebrates Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. The order Anseriformes contains about 150 living Species of Birds in three extant families the Anhimidae (the screamers Anseranatidae Sir Richard Owen KCB ( Lancaster, July 20 1804 &ndash December 18 1892) was an English Biologist Year 1875 ( MDCCCLXXV) was a Common year starting on Friday (link will display the full calendar of the Gregorian calendar (or a Common The Flying Steamer Duck, Tachyeres patachonicus, is a Steamer duck. The Magellanic Flightless Steamer Duck, Tachyeres pteneres, is a flightless Duck from South America The Falkland Steamerduck, Tachyeres brachypterus, is a Duck native to the Falkland Islands in the southern Atlantic Ocean. The White-headed Flightless Steamer Duck or Chubut Steamer Duck ( Tachyeres leucocephalus) is endemic to Argentina. A genus (plural genera from Γένος Latin genus "descent family type gender" is a low-level Taxonomic For duck as a food see Duck (food; for other meanings see Duck (disambiguation. Birds ( class Aves) are bipedal endothermic ( Warm-blooded) Vertebrate animals that lay eggs. All of the four species occur in South America, and all except T. patachonicus are flightless; even this one species capable of flight rarely takes to the air. Flightless birds are birds which lack the ability to fly relying instead on their ability to run or swim and are thought to have evolved from their flying ancestors
They are usually placed in the shelduck subfamily Tadorninae. The Shelducks, genus Tadorna, are a group of large birds in the Tadorninae subfamily of the Anatidae, the biological family In Biological classification, family ( Latin However, mtDNA sequence analyses of the cytochrome b and NADH dehydrogenase subunit 2 genes (Johnson & Sorenson, 1999) indicate that Tachyeres rather belongs into a distinct clade of aberrant South American dabbling ducks, which also includes the Brazilian, the Crested, and the Bronze-winged Ducks. Mitochondrial DNA ( mtDNA) is the DNA located in Organelles called mitochondria. A DNA sequence or genetic sequence is a succession of letters representing the Primary structure of a real or hypothetical DNA Molecule Cytochrome b/b6 is main subunit of transmembrane cytochrome bc1 and b6f complexes NADH dehydrogenase ( is an Enzyme located in the inner mitochondrial membrane that catalyzes the transfer of Electrons from NADH to Coenzyme In Structural biology, a protein subunit or subunit protein is a single Protein Molecule that assembles (or " coassembles " History See also History of genetics The existence of genes was first suggested by Gregor Mendel (1822-1884 who in the 1860s studied inheritance A clade is a taxonomic group comprising a single Common ancestor and all the descendants of that ancestor The Anatinae is a Subfamily of the family Anatidae ( Swans geese and Ducks. The Brazilian Duck or Brazilian Teal ( Amazonetta brasiliensis) is the only Duck in the genus Amazonetta. The Crested Duck ( Lophonetta specularioides) is a Species of Duck native to South America, the only member of the Monotypic The Bronze-winged Duck ( Speculanas specularis) also known as the Spectacled Duck, is a Dabbling duck and the sole member of its Genus
There are four species:
- Flying Steamer Duck Tachyeres patachonicus
- Magellanic Flightless Steamer Duck Tachyeres pteneres
- White-headed Flightless Steamer Duck Tachyeres leucocephalus
- Falkland Flightless Steamer Duck Tachyeres brachypterus
The White-headed Flightless Steamer Duck was only described in 1981. The Flying Steamer Duck, Tachyeres patachonicus, is a Steamer duck. The Magellanic Flightless Steamer Duck, Tachyeres pteneres, is a flightless Duck from South America The White-headed Flightless Steamer Duck or Chubut Steamer Duck ( Tachyeres leucocephalus) is endemic to Argentina. The Falkland Steamerduck, Tachyeres brachypterus, is a Duck native to the Falkland Islands in the southern Atlantic Ocean. Year 1981 ( MCMLXXXI) was a Common year starting on Thursday (link displays the 1981
References
- Johnson, Kevin P. & Sorenson, Michael D. (1999): Phylogeny and biogeography of dabbling ducks (genus Anas): a comparison of molecular and morphological evidence. Auk 116(3): 792–805. The Auk is a quarterly Journal and the official publication of the American Ornithologists' Union, having been continuously published by that body since PDF fulltext
Footnotes
- ^ Tachyeres, "having fast oars" or "fast rower", from Ancient Greek tachy- "fast" + eret, "oar" . An oar is an implement used for water-borne propulsion. Oars have a flat blade at one end The Ancient Greek language is the historical stage in the development of the Hellenic language family spanning the Archaic (c The common name "steamer ducks" derives from the fact that, when swimming fast, they flap their wings into the water as well as using their feet, creating an effect like a paddle steamer. A paddle steamer is a ship or boat driven by a Steam engine that uses one or more Paddle wheels to develop thrust for propulsion.
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